Detection Method and Degradation Dynamics of Chlorfenapyr in Honeysuckle Under Field Conditions
- VernacularTitle: 虫螨腈在中药材金银花上的残留检测方法与消解动态研究
- Author:
Peng-Si WANG
1
Author Information
- Publication Type:Journal Article
- Keywords: Chinese medicinal materials; Chlorfenapyr; Degradation dynamic; Honeysuckle
- From: Chinese Pharmaceutical Journal 2020;55(1):58-61
- CountryChina
- Language:Chinese
- Abstract: OBJECTIVE: To develop a gas chromatography (GC) method for determination of chlorfenapyr in flower buds of Lonicera japonica Thunb, and study the degradation dynamics of chlorfenapyr in honeysuckle collected through field experiment, thus providing theoretical references for the application of chlorfenapyr in practical production of honeysuckle. METHODS: Honeysuckle samples were extracted with acetone using a vortex mixer and then cleaned up by passing through a neutral alumina chromatography column, followed by detection by gas chromatography with electronic capture detector (GC-ECD). External standard method was used for quantification. RESULTS: At fortified levels of 0.02-0.5 mg•kg-1, the average recoveries of chlorfenapyr in honeysuckle were from 83.9% to 97.6%, with RSDs of 0.6%-9.2%. The limit of detection was estimated to be 7.3 μg•kg-1. The degradation dynamics of chlorfenapyr in honeysuckle conformed to first-order dynamic equation. The degradation half-life of chlorfenapyr was 2.3 d. CONCLUSION: The method developed in this experiment is simple, rapid, reliable and in line with the requirements of pesticide residue analysis. The degradation rate of chlorfenapyr in honeysuckle is relatively rapid. Chlorfenapyr belongs to pesticides which are liable to degradation.
